Python manifester for EasyPost shipments

manifest_shipments.py

import easypost
import argparse
import time


def manifest(tracking_codes):
    print("Manifesting: %s" % ", ".join(tracking_codes))
    shipments = [easypost.Shipment.retrieve(tracking_code)
                 for tracking_code in tracking_codes]
    batch = easypost.Batch.create(shipments=shipments)
    batch.create_scan_form()
    time.sleep(60)
    batch.refresh()
    while batch.scan_form.status == "creating":
        time.sleep(1)
        batch.scan_form.refresh()
    print(batch.scan_form)


if __name__ == "__main__":
    parser = argparse.ArgumentParser(description='Manifest shipments')
    parser.add_argument(
        '--api_key', help='Your EasyPost API Key', required=True)
    parser.add_argument('tracking_codes', metavar='TRACKING_CODE', nargs='+',
                        help='Tracking codes to manifest')
    arguments = parser.parse_args()
    easypost.api_key = arguments.api_key
    manifest(arguments.tracking_codes)